Hey
I need to convert a 20kHz pwm signal in to a DC reference voltage
I have come across numerous examples of using a simple single-pole
low pass filter. I have managed to simulate this in orcad using AC sweep,
however when i go back to transient analysis and apply my Pulse the circuit makes no effort to average/filter the signal. I have also used the LM358 datasheet which shows it configured as a low pass but still doesn't work.
Any ideas?
Cheers
I need to convert a 20kHz pwm signal in to a DC reference voltage
I have come across numerous examples of using a simple single-pole
low pass filter. I have managed to simulate this in orcad using AC sweep,
however when i go back to transient analysis and apply my Pulse the circuit makes no effort to average/filter the signal. I have also used the LM358 datasheet which shows it configured as a low pass but still doesn't work.
Any ideas?
Cheers
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